1. (2002). The traveling salesman problem and its variations. Kluwer, Dordrecht
2. Junger M, Reinelt G and Rinaldi G (1995). The traveling salesman problem. In: Ball, M, Magnanti, T, Monma, C, and Nemhauser, G (eds) Network models. Handbooks in operations research and management science, vol 7, pp 225–330. Elsevier, Amsterdam
3. Junger M, Reinelt G and Rinaldi G (1997). The traveling salesman problem. In: Dell’Amico, M, Maffioli, F, and Martello, S (eds) Annotated bibliographies in combinatorial optimization, pp 199–221. Wiley, Chichester
4. (1985). The traveling salesman problem: a guided tour of combinatorial optimization. Wiley, Chichester
5. Naddef D (2002). Polyhedral theory and branch-and-cut algorithms for the symmetric TSP. In: Gutin, G and Punnen, A (eds) The traveling salesman problem and its variations, pp 29–116. Kluwer, Dordrecht